Very rare 'Willows' yellow sapphire pendant, the oval modified brilliant-cut natural yellow sapphire weighing 35.73 carats is claw-set in a mount decorated with scroll motifs completed by a double strand trace chain, mounted in 18ct yellow gold. Accompanied by AGL Prestige Gem report numbered CS 84336, dated 24 March 2015, stating that the 35.73 carat sapphire is natural, of Australian origin, with no gemmological evidence of heat., the report additionally notes that 'The unusual combination of size, provenance, absence of treatment and quality factors present in this material contributes favorably to its rarity and desirability.' Further accompanied by an AGL letter stating that '...This outstanding sapphire possesses a deeply saturated and homogeneous pure yellow color that is uncommon for yellow sapphires from this source. In addition, this gem possesses superior clarity which results in a very high degree of transparency and is further complemented by an oval form and fine cut which adds a charm factor that is hard to quantify. Augmenting the importance of this fine gem is the fact that it also does not exhibit any gemological evidence of heating or clarity enhancement, which are commonly employed today to improve the color and quality of many sapphires. Known as the 'Willows sapphire', this remarkable yellow sapphire was reportedly unearthed in central Queensland on the 14th of August 1946, by a Mr. John Anderson. Its extraordinary size of 35.73 ct places it in a very exclusive category of Australian yellow sapphires. This gem is the largest and finest Australian yellow sapphire that the American Gemological Laboratories (AGL) has examined to date.' Provenance: Private Collection, Queensland Private Collection, New South Wales, by descent from the above
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- Claw Set Jewellery - The description "claw set" in jewellery refers to a setting where the gemstone is held in place by metal prongs that resemble claws. These prongs are bent over the edges of the gemstone to secure it in the setting. This type of setting is commonly used for diamonds and other precious stones.
- Carat - A carat (abbreviated "ct") is a unit of measurement used to describe the weight of a diamond or other gemstone, and separately is a unit of measurement used to describe the weight of precious metals such as gold,.
For gemstones, one carat is equal to 0.2 grams or 200 milligrams. The weight of a diamond is one of the Four Cs (along with cut, colour, and clarity) that are used to determine a diamond's value.
It is important to note that a diamond's weight does not necessarily correspond to its size. A diamond's cut, which affects how well it reflects light, can make a diamond of a lower weight appear larger than a diamond of a higher weight. Additionally, the carat is not the only factor to determine the value of a diamond, other factors such as clarity, colour and cut are important too.
In the gold industry, the purity of gold is measured in carats (abbreviated "ct"), with 24 karats being pure gold and lower carat numbers indicating a lower purity level. So, for example, 18 carat gold is 18/24 or 75% pure gold, and 12 carat gold is 12/24 or 50% pure gold.
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